Shenzhen ZST, a professional desktop/laptop ram manufacturer since 2002, has 15years experiences in manufacturing memory products. With creative team and efficient work , we could offer daily 20K pcs ram. We select major chips level like samsung/hynix/micron smt in Taiwan made PCB, with double sides 16chips 8 bits/16bits enables our ram work with all types motherboards. Be assured with lifetime warranty, we have won trust from customers and reputation in this field.